Understanding bra sizes can be confusing, especially when comparing sizes across different sizing systems. 38ddd and 38E are two sizes that are often considered equivalent, but there are some subtle differences between them.
The Basic Bra Sizing System
Most bras today use a basic sizing system that consists of two measurements:
- Band size – The number, such as 38 in 38ddd. This refers to the circumference of the torso under the breasts.
- Cup size – The letter, such as dd in 38ddd. This refers to the volume of the breast.
Together, these two measurements make up the bra size. So a 38ddd bra would have a 38-inch torso band size, and a dd cup size.
Cup Size Progression
Within the basic sizing system, cup sizes progress as follows:
| Cup Size | Volume |
|---|---|
| AA | Smallest |
| A | Small |
| B | Medium-small |
| C | Medium |
| D | Medium-large |
| DD | Large |
| E | Extra-large |
As you go up in cup sizes, the volume increases. So a D cup has more breast volume than a C cup, and a DD cup has more volume than a D cup.
UK vs. US Sizing Systems
One key thing to understand about 38ddd vs. 38E is that they come from different sizing systems:
- 38ddd is a US size
- 38E is a UK size
While the US and UK systems use the same basic format of band size + cup size, the actual cup letter progression differs between the systems. This means that a dd cup size in the US system is not necessarily equivalent to an E cup size in the UK system.
UK Cup Progression
In the UK system, the cup sizes progress as follows:
| UK Cup Size | Volume |
|---|---|
| AA | Smallest |
| A | Small |
| B | Medium-small |
| C | Medium |
| D | Medium-large |
| E | Large |
| F | Extra-large |
As you can see, the UK E cup comes after D, so it corresponds to a large breast volume.
US Cup Progression
In the US system, the cup progression is:
| US Cup Size | Volume |
|---|---|
| AA | Smallest |
| A | Small |
| B | Medium-small |
| C | Medium |
| D | Medium-large |
| DD | Large |
The US dd cup comes after D, corresponding to a large volume. This is one cup size smaller than the UK E cup.
Comparing 38ddd and 38E
Now that we understand the differences between US and UK sizing, we can directly compare 38ddd and 38E:
- 38ddd is a US 38 band size with a dd US cup size, which corresponds to a large breast volume.
- 38E is a UK 38 band size with an E UK cup size, which corresponds to a large breast volume.
Since UK E cups have a larger volume than US dd cups, a 38E bra will fit a larger breast than a 38ddd bra. However, both sizes indicate a full, large bust.
Volume Comparison
To illustrate the difference, here is an approximate volume comparison of 38ddd vs 38E:
| Bra Size | Cup Volume |
|---|---|
| 38ddd (US) | 620-700 ml |
| 38E (UK) | 710-790 ml |
As you can see, the 38E has a cup volume about 100 ml more than the 38ddd. So while quite similar, the 38E does have slightly more room for breast tissue.
When the Sizes May Match
While 38ddd and 38E are not exactly the same, some brands may label their bras differently, which could make the two sizes more equivalent. Here are some scenarios where a 38ddd and 38E may match in cup volume:
- A US brand uses larger dd cups that match the volume of UK E cups.
- A UK brand uses smaller E cups that match the volume of standard US dd cups.
- The brand uses an inconsistent sizing system that mixes US and UK sizes.
Because of variability between brands, the only way to know for sure if two sizes match in cup volume is to compare the actual bra dimensions between them.
Trying Both Sizes
When in doubt, your best bet is to try on both the 38ddd and 38E to see which bra size offers the best fit for your body. Focus on aspects like:
- Full cup coverage and containment
- Minimal gapping or overspill
- A supportive, secure band
It’s normal to fall between sizes, so don’t be afraid to try a range of sizes around 38ddd/E. Trying on multiple sizes will give you the best sense of your true bra size.
Sister Sizing
Finally, keep in mind that sister sizes can come into play as well. Bras that have the same cup volume but different band/cup combinations are called sister sizes.
Some examples of sister sizes for 38E and 38ddd are:
| Sister Size | Volume |
|---|---|
| 36F (UK) | Same as 38E |
| 40DD (US) | Same as 38ddd |
Trying on sister sizes allows you to experiment with cup fit and band tightness. So don’t forget to mix it up!
Key Takeaways
- 38ddd is a US size, while 38E is a UK size
- 38E bras have slightly larger cup volume than 38ddd
- Some brands may label 38ddd and 38E more similarly
- Always try both sizes to determine the best fit
- Sister sizing allows further fine tuning of band and cup fit
Conclusion
While 38ddd and 38E are close in size, 38E is technically one cup size larger. However, due to variations between brands, the only way to know if the sizes match in volume is to compare specific bras. When uncertain, try bras in both sizes, as well as sister sizes, to find your perfect fit. Focus on aspects like full cup coverage and a supportive, secure band. With some trial and error, you’ll discover your ideal 38ddd/E bra match!